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Latest Results from the Alpha Magnetic Spectrometer on the International Space Station

I review latest results from AMS on electrons and positrons in primary cosmic rays in the GeV to TeV energy range. Separate fluxes for electrons and positrons as well as their sum are presented. Neither of the fluxes is compatible with a simple power law. New data on the fraction of positrons in the joint electron and positron flux are also presented, which extend the energy range of our previous observation and increase its precision. The new results show, for the first time, that above about 200 GeV the positron fraction no longer exhibits an increase with energy. The results confirm that a common new source of electrons and positrons exists.

preprint2014arXivOpen access
Martin Pohl
hep-exphysics.ins-detastro-ph.HE
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Martin Pohl

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